happy-nerding/3xvca
3xVCA
Three high-class linear VCAs with AC/DC compatibility. Each channel has a signal input, CV input, and output with manual level and bipolar CV attenuation knobs. Switches allow summing: 1+2, 2+3, and 1+2+3 outputs. Two-colored LEDs visualize CV and output signals.771
Capabilities 3
- Independent VCAindependent-vca
- Three independent VCA channels; channels combine only via explicit sum switches (1+2, 2+3, 1+2+3), not output-normalled cascading.
- Mixermixer
- Sum switches feed one amplifier's output into the next, enabling 1+2, 2+3, and 1+2+3 mixed outputs.771
- Voltage-Controlled Amplifiervca
- Three independent linear VCAs, each with signal input, CV input, manual level knob, and bipolar CV attenuator. AC/DC coupled, suitable for audio and CV signals.771
Jacks 9 — 6 in / 3 out
| Name | Signal | Voltage | Description |
|---|---|---|---|
| Inputs (6) | |||
| CH1 CV | cv | — | 771 |
| CH1 Signal IN | mixed | — | 771 |
| CH2 CV | cv | — | 771 |
| CH2 Signal IN | mixed | — | 771 |
| CH3 CV | cv | — | 771 |
| CH3 Signal IN | mixed | — | 771 |
| Outputs (3) | |||
| CH1 OUT | mixed | — | Individual output for channel 1. Can be combined with CH2 output via sum switch (1+2). Two-colored LED visualizes output signal.771 |
| CH2 OUT | mixed | — | Individual output for channel 2. Can receive CH1 sum (1+2) or combine with CH3 (2+3 or 1+2+3) via sum switches. Two-colored LED visualizes output signal.771 |
| CH3 OUT | mixed | — | Individual output for channel 3. Can receive 2+3 or 1+2+3 sum via sum switches. Two-colored LED visualizes output signal.771 |
Parameters 8
| Name | Type | Range | Behavior |
|---|---|---|---|
| CH1 CV Attenuator | knob | — | Bipolar CV attenuator for channel 1. Controls the amount and polarity of CV influence on the VCA gain.771 |
| CH1 Level | knob | — | Sets the manual output level of channel 1 VCA.771 |
| CH1+CH2 Sum Switch | switch | — | When engaged, feeds channel 1 output into channel 2 output, producing a 1+2 mix at the CH2 output.771 |
| CH2 CV Attenuator | knob | — | Bipolar CV attenuator for channel 2. Controls the amount and polarity of CV influence on the VCA gain.771 |
| CH2 Level | knob | — | Sets the manual output level of channel 2 VCA.771 |
| CH2+CH3 Sum Switch | switch | — | When engaged, feeds channel 2 output into channel 3 output, producing a 2+3 (or 1+2+3 if CH1+CH2 switch also engaged) mix at the CH3 output.771 |
| CH3 CV Attenuator | knob | — | Bipolar CV attenuator for channel 3. Controls the amount and polarity of CV influence on the VCA gain.771 |
| CH3 Level | knob | — | Sets the manual output level of channel 3 VCA.771 |
Firmware history 0 versions
No firmware history recorded.
References 1
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[771]
Happy Nerding 3xVCA product pageproduct_page● verified 2026-05-22